Device for activating sludge.



L. E. REIN &1. W.COX. l

DEVICE FOR ACTIVATING SLUDGE. l

Patened Dee. 3,1918.

, UNTTED STATES PATENT oEEicE. N

LESTER E. REIN AND JAMES W. COX, OF CHICAGO, ILLINOIS, ASSIGNORS TO PACIFIC pump 10, the inlet Afor Activating FLUSH TANK COMPANY,

OF CHICAGO, ILLINOIS, A

CORPORATION OF ILLINOIS.

DEVICE FOR ACTIVATIN G SLUDGE.

Specification of Letters Patent.

Patented nee. a, 1918.

Application filed October 6, 1916. l Serial No. 124,155.

To all whom t may concern.'

Be it known that we, LESTER E. REIN and JAMES W. Cox, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Devices Sludge, of which the following is a specification.

Prior to our invention it has been'known that sludge, sewage and the like, can be made inotl'ensive'and innocuous by subjecting it to bacterial action, and that .this action can be very largely increased and certain chemical changes of a desirable/nature effected by aerating the same. Our invention "relates to certain improved apparatus for effecting this aeration.

In the accompanying drawing we have shownV and in the following specification described in detail a preferred embodiment of our invention. It is to be understood, however, that the specific disclosure is for the purpose ofl exemplilication only and that the scope of the invention is deined 1n the following claims in which we have ens deavored to distinguish it from the prior ar so far as known to us without, however, rg linouishing or abandoning any portion drawn.v It is to be understood, however, that v the invention is'equally applicable to tanks in which there is no such continual flow. In the particular form of tank shown the main receptacle-4 is provided withascreening tank 5 into which the sewage f lows from a supply pipe 6' and fromwhich 1t Hows at 7 over a dam into the main tank. A screen 8 of any suitable form is provided in the chamber. Ail outlet pipe.9 for permitting the escape of the watery contents of the sludge after it has been submltted to treat-4 mentis provided at the end of the main tank remote from the inlet thereto.

Our improved apparatus comprises a 11 of which extends be- `18 Each of the vertical vided with a valve 1n such manner that it is pipe.

neath the level of the sewage in the tank, and the outlet of which is connected to a transverse distributing pipe 12, from which lead longitudinal pipes 13. Each longitudinal pipe is provided with a series of vertical return pipes 14 depending therefrom and extending nearly to the bottom of the tank, and beneath the lower open end of each pipe 14 is arranged a guide bowl 15 having a central projection 16, the purpose and effect flf whih is to receive the material flowing t roug pi es 14 and divert it u ward into the body Idf the material withlnP/fg tank. This system'. of piping may be supported in any suitable manner above the tank, as for example, by the beams 17,' and the pump is provided with a suitable motor pipes 14 is provided an injector nozzle 19 to which is conpipe 20opening to the air and pro- 21 for controlling the wlth nected a same.

The operation of the construction will be readily understood. The pump is continuously operated and draws a constant stream of sewage from the body thereofand distributes it through the various longitudinal pipesand to the vertical pipes which are so numerously arranged as to discharge the ma-v terial into all portions of the tank. Before its return to the tank, however, the sewage or sludge is aerated, air being drawn in through the injectors above described in a quantity which may be regulated vided for that purpose. The aerated sludge is discharged at the bottom of the tank anddistributed throughs out the body of the sewage. thus supplying air to all the portions thereof. Furthermore the circulation of the sludge by this means effects a constant agitation ofthe body of the latter whereby the desired changes are hastened.

We claim: A

1. An apparatus for activating sludge comprising a sewage tankhaving an inlet and an overfiow outlet, a pump having anF inlet member adapted' to extendwithin said tank, a return pipe connected to the exhaust of said pump and air into the material intermediate the inlet of the pump and the outlet of the return 2. In a device of the class described, a sewage tank having an inlet and an over-l means for introducing bv the valves proadapted` to 'A adapted to extend` of return pipes connected to the exhaust of flow outlet, a pump having an inlet memberl into said tank, a series the pump and means into the return pipes.

l 3. In a device for the purpose described, a sewage tank having an inlet and an overiiow outlet, a pump having an inlet member adapted to extend into said tank, a return pipe'connected to the exhaust of' the pump and an injector adapted to inject air into the material flowing through the pump for introducing air turn pipe.

4. In a device of the class described, a sewage tank having an inlet and an overiow outlet, a pump having an inlet member extend into said tank, a return pipe connected to the outlet of the pump and an injector located in the return pipe an adapted to introduce air into the material flowing therethrough.

5. In a device of the class described, a

and rean injector sewage tank 'having'an' inlet and an overflow outlet, a pump having an inlet member adaptedto extend vinto said tank, a system of distributing pipes connected to the exhaust of the pump, a series of return pipes connected to the distributing pipes and injectors connected to the return pipes and adapted to introduce air into material flowing thereintd 6. In a device* of the class described, a sewage tank having an inlet and an overflow outlet, a pump having an inlet member adapted to extend into said tank, a return pipe connected to the exhaust of' the pump, connected to the return pipe and adapted to inject air into the contents thereof, and a deflector guide arranged' at the outlet of the return pipe and a the, discharge therefrominto the body of the material in the tank. p f

s LESTER E. REIN. JAMES W.VC0`X.

dapted to deflect 40 

